Vacuum Ultraviolet Absorption Measurements of Atomic Oxygen in a Shock Tube (Paperback) (ISBN-13: 9781288916207)

The absorption of vacuum ultraviolet light by atomic oxygen has been measured in the Electric Arc-driven Shock Tube (EAST) Facility at NASA-Ames Research Center. This investigation demonstrates the instrumentation required to determine atomic oxygen concentrations from absorption measurements in impulse facilities. A shock wave dissociates molecular oxygen, producing a high temperature sample of atomic oxygen in the shock tube. A probe beam is generated with a Raman-shifted ArF excimer laser. By suitable tuning of the laser, absorption is measured over a range of wavelengths in the region of the atomic line at 130.49 nm. The line shape function is determined from measurements at atomic oxygen densities of 3x10(exp 17) and 9x10(exp 17) cm(exp -3). The broadening coefficient for resonance interactions is deduced from this data, and this value is in accord with available theoretical models.

Author: National Aeronautics and Space Administr,Scott Andrew Meyer
ISBN-10: 1288916205
ISBN-13: 9781288916207
Publisher: Biblioscholar
Language: English
Published: 03/13/2013
Pages: 138
Format: Paperback
Weight: 0.57lbs
Size: 9.69h x 7.44w x 0.30d